Physics puzzlers aren't just about flinging birds across the screen – sometimes you need to build something. In fact, sometimes you need to build something really complicated and awesome. That's the trail blazed by Apparatus, and Principia is following its path. This game invites you to design bridges, towers, cars, rocket ships and more using over 150 different objects.

The trailer has some amazing stuff in it, but it also makes me feel slightly intimidated.

Who wants a free Galaxy Nexus? You do? We thought so, and we've one to give away - CDMA or GSM, it's winner's choice this time.

Before we get into the giveaway details, though, we want to give some love to the guys at BitHack, without whom this giveaway wouldn't be possible. BitHack is the dev team behind the game Apparatus, a title that you've probably heard quite a few times 'round here at Android Police.

I feel a little bit of an attachment to Apparatus - we were one of the first blogs to review the game, which was a nice discovery while browsing Reddit one day. I've seen the app grow and add a whole boatload of interesting features; it truly is one of the Android platform's best games.

So when we got word today that it was finally leaving beta and stepping into the world of "finished" products, I couldn't help but smile a little bit.

Lodsys, the king troll of all patent trolls, has been attacking developers of both Android and iOS apps for a few months now (yeah, even Rovio) with their claims of owning a patent to the free->paid upgrade process using in-app purchases.

Their latest victim is Bithack, the developer of Apparatus. Yup, the same Bithack who raised hell about the Amazon Appstore last month and whose game is currently averaging 4.6 stars in the Market.

When we published a piece reporting on the recent decision of game developer Bithack to pull its popular title Apparatus from the Amazon Appstore, we contacted Amazon asking for comment on the whole situation.

Earlier this week, Amazon got back to us and wanted to sit down and discuss the Appstore and some of the issues that developers and customers alike have had. While Amazon could not specifically discuss the complaints of Bithack for confidentiality reasons, they were able to generally talk about some of the concerns Bithack raised.